R的ggplot2画图,去除灰色阴影和网格的方式

 + theme_bw() +
 theme(panel.grid.major=element_line(colour=NA),
      panel.background = element_rect(fill = "transparent",colour = NA),
      plot.background = element_rect(fill = "transparent",colour = NA),
      panel.grid.minor = element_blank())

library(ggplot2)
ggplot(iris,aes(x=Sepal.Length,y=Sepal.Width))+
 geom_point(aes(color=Species))

library(ggplot2)
ggplot(iris,aes(x=Sepal.Length,y=Sepal.Width))+
 geom_point(aes(color=Species))+
 theme(legend.key = element_blank())